What is erythropoiesis?

I - The proerythroblast has a nucleus.
II - As it differentiates into an erythrocyte, the concentration of hemoglobin inside it increases.
III - The nucleus condenses (20 μm 7 μm).
IV - Membranous organelles (mitochondria, ER, Golgi apparatus) are reabsorbed.
V - The final concentration of hemoglobin can increase up to 34%.
VI - Finally, the nucleus is expelled.
VII - The reticulocyte enters the bloodstream and remains there for 24-48 hours until it matures into an erythrocyte.
a) I, II, III, IV, V, VI and VII are correct.
b) I, II, III, IV and V are correct.
c) II, III, IV, V, VI and VII are correct.
d) I, II, III, IV and VI are correct.
e) II, III, IV, V and VII are correct.